* {
  margin: 0;
  padding: 0;
}
em {
  font-style: normal;
}
li {
  list-style: none;
}
a {
  text-decoration: none;
}
img {
  border: none;
  vertical-align: top;
}
table {
  border-collapse: collapse;
}
input,
textarea {
  outline: none;
}
textarea {
  resize: none;
  overflow: auto;
}
body {
  font: 12px "微软雅黑";
}

header {
  width: 90%;
  height: 50px;
  margin: 20px auto;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 0.5px solid rgb(210, 210, 210);
}

header input {
  width: 130px;
  height: 20px;
  margin-right: 20px;
}
header div {
  width: 50px;
  height: 20px;
  background-color: rgb(42, 141, 255);
  color: white;
  text-align: center;
  line-height: 20px;
  border-radius: 10%;
  -webkit-border-radius: 10%;
  -moz-border-radius: 10%;
  -ms-border-radius: 10%;
  -o-border-radius: 10%;
}
table {
  width: 90%;
  height: 50px;
  margin: 20px auto;
}
table tr {
  display: flex;
  height: 30px;
  line-height: 30px;
}
table th,
table td {
  flex: 20%;
  text-align: center;
}
table th:nth-child(2),
table td:nth-child(2) {
  flex: 50%;
  text-align: left;
}
table th {
  background-color: gainsboro;
}
table td:last-child {
  display: flex;
  justify-content: center;
}
.del {
  color: red;
  margin-right: 10px;
}
.change {
  color: blue;
}
